Abstract
3-(Benzothiazol-2-yl)-3-oxopropanenitrile ( 1) reacts with phenylisothiocyanate in the presence of potassium hydroxide followed by addition of the hydrazonoyl bromides 2a-c to afford the novel 1,3,4- thiadiazole derivatives 6a-c via the intermediate 4. Reaction of 4 with 2-bromoacetylbenzothiazole ( 3) furnished the new polysubstituted thiophene 13. Treatment of the latter product with aromatic diazonium salts resulted in the formation of 2-arlazothiophene derivatives 16a-c. A suggested mechanisms of the investigated reactions were presented.
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